摘要
以桂西北地区光皮桦人工林为研究对象,以更全面反映林分整体生长规律的径阶标准木为材料,通过树干解析及采用Richards曲线方程进行建模,对14年生光皮桦人工林的胸径、树高和单株材积的生长过程进行了精度较高的拟合,并据此分析了光皮桦人工林胸径、树高及单株材积的生长节律。结果表明:光皮桦胸径、树高及材积与生长年龄的回归关系均达到极显著水平(p<0.001),拟合度分别为86.1%、95.1%、84.1%,模拟方程可用于光皮桦人工林的生长分析和预测。光皮桦人工林的胸径、树高与材积的速生期分别出现在1~6、1~7和6~12 a,根据林分个体分化的初显与稳定两个特征,确定7~8年生、12年生可分别作为光皮桦种质评价的初选年龄与决选年龄。
The standard trees of different diameter classes of 14-year-old Betula luminifera plantation in the northwest of Guangxi were selected to stimulate the growth dynamics of Dt3H, tree height and individual volume by stem analysis and Richard＇s regression analysis. The results showed that there were significant differences in the relationships between DBH, tree height, individual volume and tree age （P 〈 0.001） and the regression coefficients were 0.86, 0.95 and 0.84 respectively, indicating that these regression models could be used to predict the growth ofBetula luminifera plantation. The fast-growing periods of DBH, tree height and individual volume were from first to sixth, first to seventh and sixth to twelfth year, respectively. However, the preliminary and final age of evaluating the growth of this species were from seventh to eighth year, and twelfth year according to the characteristics of individual differentiation.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2017年第4期33-37,共5页
Journal of Central South University of Forestry & Technology
基金
国家林业局林业行业公益专项项目"西南桦
光皮桦优良无性系育林技术研究"(20110604)
关键词
光皮桦
树干解析
生长规律
种质评价年龄
Betulal luminifera H.Wink
stem analysis
growth rhythm
germplasm resources evaluating age
